🚀 go-pugleaf

Richard Lucock (rmal@jet.uk) wrote:
> Terrance Richard Boyes <tez@pierrot.demon.co.uk> writes:
> 
> >This is how most (if not all) NNTP software works. I think that this is a
> >function of the server.
> 
> I'm not too sure that it is a function of the server - that would
> require the server to keep a note of what you have asked for
> already.

That depends how the NEWNEWS command works, if it checks Message-Id's are
not duplicated during one session then it is the server, similarly if it
understands XREF's then it's the server.

>          Certainly the NNTPd at news.demon.co.uk will serve you the
> same article twice from different newsgroups (I tested this by usng
> telnet to connect and run the session).

That's a slightly different way of doing things, you've deliberately gone
and asked for the same article twice, you would get the same result if
you telnet to the server, and try to get it twice from the same newsgroup.

The way to really check is telnet news nntp, and issue a NEWNEWS command
for a couple of groups, in which you know there's a crosspost, then check
what you've received.

>                                          I suppose its possbile that
> Demon themselves keep multiple copies of cross-posted articles.

At a guess, they probably keep links between the articles.

Note all the above is speculation :) All I know is that GW's NNTPClient
only retrieves one copy of a crossposted article, rnews doesn't add the
appropriate XREF header, and DanNews does...

-- 
~ Warning Random Fortune Sig follows ~
Whoever controls the media -- the images -- controls the culture.
 - Allen Ginsberg